18 September 1918: Major Rudolph William Schroeder, Chief Test Pilot of the Engineering Division, McCook Field, Ohio, flew a Packard Lepère LUSAC 11 biplane to two Fédération Aéronautique Internationale (FAI) World Records when he reached 9,455 meters (31,020.34 feet).¹ ² This was 839 meters (2,752.62 feet) higher than he had flown in the same airplane on 6 September while carrying a passenger.

The biplane was powered by a turbo-supercharged 1,649.3-cubic-inch-displacement (27.03 liter) liquid-cooled Liberty L-12 single overhead cam (SOHC) 45° V-12 engine which produced 449 horsepower at 2,000 r.p.m. Aeronautical engineer Dr. Sanford Alexander Moss developed the use of a turbocharger on aircraft engines.

The Packard Lepère LUSAC 11 was a World War I biplane designed by French aeronautical engineer Captain Georges Lepère and built by the Packard Motor Car Company of Detroit, Michigan. It was to have been a two-place fighter, light bomber and observation aircraft armed with four machine guns.

The Packard Lepère was 25 feet, 3-1/8 inches (7.699 meters) long. The upper and lower wings had an equal span of 41 feet, 7¼ inches (12.681 meters), and equal chord of 5 feet, 5¾ inches (1.670 meters). The vertical gap between the wings was 5 feet, 5/8-inch (1.527 meters) and the lower wing was staggered 2 feet, 15/16-inch (0.633 meters) behind the upper wing. The wings’ incidence was +1°. Upper and lower wings were equipped with ailerons, and had no sweep or dihedral. The height of the Packard Lepère, sitting on its landing gear, was 9 feet, 7 inches (2.921 meters). The Packard Lepère had an empty weight of 2,561.5 pounds (1,161.9 kilograms) and its gross weight was 3,746.0 pounds (1,699.2 kilograms).

The fuselage was a wooden structure with a rectangular cross section. It was covered with three layers of veneer, (2 mahogany, 1 white wood) with a total thickness of 3/32-inch (2.38 millimeters). The fuselage had a maximum width of 2 feet, 10 inches (0.864 meters) and maximum depth of 4 feet, 0 inches (1.219 meters).

The wings were also of wooden construction, with two spruce spars and spruce ribs. Three layers of wood veneer covered the upper surfaces. Heavy bracing wires were used. These had an airfoil cross-section and actually provided additional lift. The interplane struts were unusual in that they were fully-framed units.

The Packard Lepère was 25 feet, 3-1/8 inches (7.699 meters) long. The upper and lower wings had an equal span of 41 feet, 7¼ inches (12.681 meters), and equal chord of 5 feet, 5¾ inches (1.670 meters). The vertical gap between the wings was 5 feet, 5/8-inch (1.527 meters) and the lower wing was staggered 2 feet, 15/16-inch (0.633 meters) behind the upper wing. The wings’ incidence was +1°. Upper and lower wings were equipped with ailerons, and had no sweep or dihedral. The height of the Packard Lepère, sitting on its landing gear, was 9 feet, 7 inches (2.921 meters). The Packard Lepère had an empty weight of 2,561.5 pounds (1,161.9 kilograms) and its gross weight was 3,746.0 pounds (1,699.2 kilograms).

The fuselage was a wooden structure with a rectangular cross section. It was covered with three layers of veneer, (2 mahogany, 1 white wood) with a total thickness of 3/32-inch (2.38 millimeters). The fuselage had a maximum width of 2 feet, 10 inches (0.864 meters) and maximum depth of 4 feet, 0 inches (1.219 meters).

The wings were also of wooden construction, with two spruce spars and spruce ribs. Three layers of wood veneer covered the upper surfaces. Heavy bracing wires were used. These had an airfoil cross-section and actually provided additional lift. The interplane struts were unusual in that they were fully-framed units.

The engine coolant radiator was positioned horizontally in the center section of the Lepère’s upper wing. Water flowed through the radiator at a rate of 80 gallons (303 liters) per minute.

Packard Lepère L USA C.II, P54, S.C. 42138 (U.S. Air Force)

The Packard Lepère had a maximum speed of 130.4 miles per hour (209.9 kilometers per hour) at 5,000 feet (1,524 meters), 127.6 miles per hour (205.4 kilometers per hour) at 10,000 feet (3,048 meters), 122.4 miles per hour (197.0 kilometers per hour) at 15,000 feet (4,572 meters), 110.0 miles per hour (177.0 kilometers per hours) at 18,000 feet (5,486 meters) and 94.0 miles per hour (151.3 kilometers per hour) at 20,000 feet (6,096 meters). Its cruising speed was 112 miles per hour (180 was kilometers per hour). The airplane could climb to 5,000 feet in 4 minutes, 24 seconds, and to 20,000 feet in 36 minutes, 36 seconds. In standard configuration, the Packard Lepère had a service ceiling of 20,200 feet (6,157 meters). Its range was 320 miles (515 kilometers).

The fighter’s armament consisted of two fixed M1918 Marlin .30-caliber aircraft machine guns mounted on the right side of the fuselage, synchronized to fire forward through the propeller arc, with 1,000 rounds of ammunition, and two M1918 Lewis .30-caliber machine guns on a flexible mount with 970 rounds of ammunition.

The Air Service had ordered 3,525 of these airplanes, but when the War ended only 28 had been built. The contract was cancelled.

Packard Lepère L U.S.A. C.II in flight.

Six Packard Lepères were used for flight testing at McCook Field, Dayton, Ohio, assigned project numbers P 44, P 53, P 54, P 65, P 70 and P 80. One of these, flown by Major Rudolph W. Schroeder, set two Fédération Aéronautique Internationale (FAI) World Records for Altitude at 9,455 meters (31,020 feet), 18 September 1918.¹ On 6 September 1919, Schroeder flew a Packard Lepère to 8,616 meters (28,268 feet) while carrying a passenger. This set two more World Altitude Records.² Flying P 53, A.S. 40015, he set a fifth FAI altitude record of 10,093 meters (33,114 feet), 27 February 1920.³ On 28 September 1921, Captain John A. Macready flew P 53 to an altitude of 40,800 feet (12,436 meters). On 13 October 1922, 1st Lieutenant Theodore J. Koenig flew P 53 to win the Liberty Engine Builders’ Trophy Race at Selfridge Field, near Mount Clemens, Michigan. Koenig completed ten laps of the triangular racecourse in 2:00:01.54, at an average speed of 128.8 miles per hour (207.3 kilometers per hour).

The only Packard Lepère in existence, serial number A.S. 42133, is in the collection of the National Museum of the United States Air Force, Wright-Patterson Air Force Base, Ohio.

Packard Lepère LUSAC 11, S.C. 42133, at the National Museum of the United States Air Force. (U.S. Air Force)

6 September 1919: Major Rudolph William Schroeder, Chief Test Pilot of the Engineering Division, McCook field, Ohio, with Lieutenant George W. Elsey as a passenger, flew a Packard Lepère LUSAC 11 biplane to two Fédération Aéronautique Internationale (FAI) World Records, reaching an altitude of 8,616 meters (28,268 feet).¹ ²

The biplane was powered by a turbo-supercharged 1,649.3-cubic-inch-displacement (27.028 liter) liquid-cooled Liberty L-12 single overhead cam (SOHC) 45° V-12 engine which produced 449 horsepower at 2,000 r.p.m. Aeronautical engineer Dr. Sanford Alexander Moss developed the use of a turbocharger on aircraft engines.

Lieutenant George W. Elsey, Air Service, United States Army, photographed at McCook Field, Ohio, 18 November 1919. (NASM)

The Packard Lepère LUSAC 11 was a World War I biplane designed by French aeronautical engineer Captain Georges Lepère and built by the Packard Motor Car Company of Detroit, Michigan. It was to have been a two-place fighter, light bomber and observation aircraft armed with four machine guns.

The Packard Lepère was 25 feet, 3-1/8 inches (7.699 meters) long. The upper and lower wings had an equal span of 41 feet, 7¼ inches (12.681 meters), and equal chord of 5 feet, 5¾ inches (1.670 meters). The vertical gap between the wings was 5 feet, 5/8-inch (1.527 meters) and the lower wing was staggered 2 feet, 15/16-inch (0.633 meters) behind the upper wing. The wings’ incidence was +1°. Upper and lower wings were equipped with ailerons, and had no sweep or dihedral. The height of the Packard Lepère, sitting on its landing gear, was 9 feet, 7 inches (2.921 meters). The Packard Lepère had an empty weight of 2,561.5 pounds (1,161.9 kilograms) and its gross weight was 3,746.0 pounds (1,699.2 kilograms).

The fuselage was a wooden structure with a rectangular cross section. It was covered with three layers of veneer, (2 mahogany, 1 white wood) with a total thickness of 3/32-inch (2.38 millimeters). The fuselage had a maximum width of 2 feet, 10 inches (0.864 meters) and maximum depth of 4 feet, 0 inches (1.219 meters).

The wings were also of wooden construction, with two spruce spars and spruce ribs. Three layers of wood veneer covered the upper surfaces. Heavy bracing wires were used. These had an airfoil cross-section and actually provided additional lift. The interplane struts were unusual in that they were fully-framed units.

The Packard Lepère was 25 feet, 3-1/8 inches (7.699 meters) long. The upper and lower wings had an equal span of 41 feet, 7¼ inches (12.681 meters), and equal chord of 5 feet, 5¾ inches (1.670 meters). The vertical gap between the wings was 5 feet, 5/8-inch (1.527 meters) and the lower wing was staggered 2 feet, 15/16-inch (0.633 meters) behind the upper wing. The wings’ incidence was +1°. Upper and lower wings were equipped with ailerons, and had no sweep or dihedral. The height of the Packard Lepère, sitting on its landing gear, was 9 feet, 7 inches (2.921 meters). The Packard Lepère had an empty weight of 2,561.5 pounds (1,161.9 kilograms) and its gross weight was 3,746.0 pounds (1,699.2 kilograms).

The fuselage was a wooden structure with a rectangular cross section. It was covered with three layers of veneer, (2 mahogany, 1 white wood) with a total thickness of 3/32-inch (2.38 millimeters). The fuselage had a maximum width of 2 feet, 10 inches (0.864 meters) and maximum depth of 4 feet, 0 inches (1.219 meters).

The wings were also of wooden construction, with two spruce spars and spruce ribs. Three layers of wood veneer covered the upper surfaces. Heavy bracing wires were used. These had an airfoil cross-section and actually provided additional lift. The interplane struts were unusual in that they were fully-framed units.

The engine coolant radiator was positioned horizontally in the center section of the Lepère’s upper wing. Water flowed through the radiator at a rate of 80 gallons (303 liters) per minute.

Packard Lepère L USA C.II, P54, S.C. 42138 (U.S. Air Force)

The Packard Lepère had a maximum speed of 130.4 miles per hour (209.9 kilometers per hour) at 5,000 feet (1,524 meters), 127.6 miles per hour (205.4 kilometers per hour) at 10,000 feet (3,048 meters), 122.4 miles per hour (197.0 kilometers per hour) at 15,000 feet (4,572 meters), 110.0 miles per hour (177.0 kilometers per hours) at 18,000 feet (5,486 meters) and 94.0 miles per hour (151.3 kilometers per hour) at 20,000 feet (6,096 meters). Its cruising speed was 112 miles per hour (180 was kilometers per hour). The airplane could climb to 5,000 feet in 4 minutes, 24 seconds, and to 20,000 feet in 36 minutes, 36 seconds. In standard configuration, the Packard Lepère had a service ceiling of 20,200 feet (6,157 meters). Its range was 320 miles (515 kilometers).

The fighter’s armament consisted of two fixed M1918 Marlin .30-caliber aircraft machine guns mounted on the right side of the fuselage, synchronized to fire forward through the propeller arc, with 1,000 rounds of ammunition, and two M1918 Lewis .30-caliber machine guns on a flexible mount with 970 rounds of ammunition.

The Air Service had ordered 3,525 of these airplanes, but when the War ended only 28 had been built. The contract was cancelled.

Packard Lepère L U.S.A. C.II in flight.

Six Packard Lepères were used for flight testing at McCook Field, Dayton, Ohio, assigned project numbers P 44, P 53, P 54, P 65, P 70 and P 80. One of these, flown by Major Rudolph W. Schroeder, set two Fédération Aéronautique Internationale (FAI) World Records for Altitude at 9,455 meters (31,020 feet), 18 September 1918.¹ On 6 September 1919, Schroeder flew a Packard Lepère to 8,616 meters (28,268 feet) while carrying a passenger. This set two more World Altitude Records.² Flying P 53, A.S. 40015, he set a fifth FAI altitude record of 10,093 meters (33,114 feet), 27 February 1920.³ On 28 September 1921, Captain John A. Macready flew P 53 to an altitude of 40,800 feet (12,436 meters). On 13 October 1922, 1st Lieutenant Theodore J. Koenig flew P 53 to win the Liberty Engine Builders’ Trophy Race at Selfridge Field, near Mount Clemens, Michigan. Koenig completed ten laps of the triangular racecourse in 2:00:01.54, at an average speed of 128.8 miles per hour (207.3 kilometers per hour).

The only Packard Lepère in existence, serial number A.S. 42133, is in the collection of the National Museum of the United States Air Force, Wright-Patterson Air Force Base, Ohio.

Packard Lepère LUSAC 11, S.C. 42133, at the National Museum of the United States Air Force. (U.S. Air Force)

¹ FAI Record File Number 15464: World record for altitude with one passenger

² FAI Record File Number 15675: World record for altitude with passengers.

27 May 1919: NC-4, designating number A2294, one of three United States Navy Curtiss NC flying boats, arrived at the harbor of Lisbon, Portugal, becoming the first airplane to cross the Atlantic Ocean.

NC-4 was under the command of Lieutenant Commander Albert Cushing Read, United States Navy, who also served as navigator. The pilots were First Lieutenant Elmer Fowler Stone, United States Coast Guard, and Lieutenant (j.g.) Walter T. Hinton, U.S. Navy. Lieutenant James L. Breese, USN and Chief Machinist Mate Eugene S. Rhoads, USN, were the engineers. Ensign Herbert C. Rodd, USN, was the radio operator.

Aboard the other aircraft were officers who would rise to high rank in the Navy: Commander John H. Towers would later command the Pacific Fleet; Lieutenant Marc A. Mitscher commanded the Fast Carrier Task Force during World War II, and later commanded the Atlantic Fleet. Lieutenant Patrick N.L. Bellinger commanded Patrol Wing 2 at Pearl Harbor on 7 December 1941, and would go on to command Naval Air Forces, Atlantic Fleet.

Three Curtiss flying boats, NC-1 (A2291), NC-3 (A2293) and NC-4 (A2294), under the command of Lieutenant Commander John H. Towers, USN, departed Naval Air Station Rockaway, New York City, at 10:00 a.m., 8 May 1919 and flew to NAS Chatham, Massachusetts.

Enroute, NC-4 experienced an oil leak from the center pusher engine, so it was shut down. This slowed the airplane, but it was still able to continue. In mid-afternoon, however, the center tractor engine suffered a failed connecting rod. With only two engines operating, NC-4 was forced down at sea, approximately 80 miles (129 kilometers) from Chatham. The sea was calm and the flying boat taxied the remaining distance on the water. It arrived there at 7:00 a.m., 9 May.

Curtiss NC-4, 1 October 1919. (New Bedford Whaling Museum)

At the air station, the failed engine was replaced with a 300 horsepower Liberty L12, the only spare engine available. The other engine was repaired.

Delayed several days by weather, NC-4 departed NAS Chatham at 9:15 a.m., 14 May, and flew to Halifax, Nova Scotia, landing at 1:07 p.m. Continuing to Newfoundland would have them arriving after dark.

NC-4 took off from the waters of Halifax the following morning at 11:47 a.m., and arrived at Trepassey Bay, Newfoundland at 5:41 p.m., rendezvousing with the aircraft tender USS Aroostook (CM-3). NC-1 and NC-3 had arrived two days earlier.

All three airplanes were serviced from the tender. The temporary 300 horsepower Liberty engine which had been installed on NC-4 was replaced with a correct 400 horsepower engine.

NC-4 departs Trepassey Bay, Newfoundland, 16 May 1919. (U.S. Navy)

The three Curtiss flying boats took off from Trepassey Bay at 6:00 p.m. on the evening of 16 May and headed across the Atlantic Ocean to the Azores.

NC-1 and NC-3 were both forced down by rain, heavy clouds and thick fog about 200 miles short of their destination. NC-1 was damaged and unable to continue. The crew was rescued by a Greek freighter and the airplane taken in tow, but it sank several days later. NC-3 drifted for two days on surface of the Atlantic, coming within sight of land, two engines were started and NC-3 taxied into the harbor at Ponta Delgada, Ilha de São Miguel.

NC-4 deviated from its course and landed at Horta, on Faial Island, at 1:23 p.m., 17 May. Weather kept NC-4 at Horta for the next few days, until at 8:45 a.m. on the 20th, it took off and flew to Ponta Delgado, landing there just two hours later.

NC-4 was the fourth of ten NC flying boats built by the Curtiss Aeroplane and Motor Company. It was 68 feet, 3 inches (20.803 meters) long with a wingspan of 126 feet (38.405 meters) and height of 24 feet, 6 inches (7.468 meters). The empty weight was 15,874 pounds (7,200.3 kilograms) and maximum takeoff weight was 21,500 pounds (9,752.2 kilograms).

This water-cooled, 1,649.3-cubic-inch (27.028 liter) Ford-built Liberty 12 Model A single-overhead-camshaft V-12 engine at the National Air and Space Museum was one of four engines powering NC-4 during its transatlantic flight in May 1919. (NASM)

Originally built with three engines, flight testing led to the addition of a fourth. These were water-cooled, normally-aspirated, 1,649.336-cubic-inch-displacement (27.028 liter) Liberty L-12 single overhead cam (SOHC) 45° V-12 engines with a compression ratio of 5.4:1. The Liberty produced 408 horsepower at 1,800 r.p.m. Two were mounted in a center nacelle with one in tractor and one in pusher configuration. Two more were in individual nacelles in tractor configuration.

NC-4 had a maximum speed of 90 miles per hour (145 kilometers per hour), a service ceiling of 4,500 feet (1,372 meters) and range of 1,470 miles (2,366 kilometers).

NC-4 was restored by the Smithsonian Institution during the early 1960s and remains a part of its collection, though it is on long term loan to the Naval Aviation Museum, Pensacola, Florida.